The Stellar Halo of the Spiral Galaxy NGC 1560
arXiv:1805.10056 · doi:10.3847/1538-4357/aac821
Abstract
We report on the detection of a stellar halo around NGC 1560, a 10^9 Mo spiral galaxy member of the Maffei group. We obtained deep images in the r and i bands using the 10.4m Gran Telescopio Canarias in a field centered at ~ 3.7 arcmin (projected distance of 3.5 kpc) from the center of this galaxy. The luminosity function and the CMD show a clear excess of stars with respect to the expected foreground level at magnitudes fainter than the RGB tip at the distance of NGC 1560. The color of the halo stars implies a metallicity of Z ~ Zo/50, while their counts correspond to a stellar mass of ~ 10^7 Mo in the sampled region. Assuming a power law profile for the surface mass density of the halo, our data suggest a total stellar mass of 10^8 Mo for the halo of NGC 1560.
Ap.J. Accepted, 10 pages, 8 figures
References in corpus (7)
- The stellar mass assembly of galaxies in the Illustris simulation: growth by mergers and the spatial distribution of accreted stars
- The Dragonfly Nearby Galaxies Survey. I. Substantial variation in the diffuse stellar halos around spiral galaxies
- Diverse Stellar Haloes in Nearby Milky Way-Mass Disc Galaxies
- Parametrizing the Stellar Haloes of Galaxies
- Simulations of the formation and evolution of isolated dwarf galaxies
- Kinematics and simulations of the stellar stream in the halo of the Umbrella Galaxy
- Origin of dwarf irregular galaxies with outer early-type structures